Dating postcard photographs
½d 1900 - 1901 Blue-Green Quenn Victoria died on 22 January 1901 Great Britain was the first country to sanction the use of the divided back postcard in 1902. The divided back allowed for one side of the card to be used for both the address and a message seperated by a central line.
The other side could be a complete picture (or photograph) Prior to this (undivided back) cards were in use which allowed for address only on one side and a brief greeting on the picture side.
If you’re really lucky, you might spot a legible license plate.
Wisconsin license plates had the last two digits of the year printing in a vertical manner on the side of the plate, much larger than the stickers used today.
Stamps illustrated are the common issues for the relevant 'postcard rate' of the period.